user
For the given recipe, make modifications and write a recipe of a healthier version.
Input: Chocolate Chip Cookies
2 3/4 cups all-purpose flour
1 teaspoon baking soda
1 teaspoon salt
1 cup (2 sticks) butter, melted
3/4 cup granulated sugar
3/4 cup packed light-brown sugar
2 large eggs
2 teaspoons vanilla extract
2 cups semisweet chocolate chips
Output:
assistant
Healthier Chocolate Chip Cookies 
2 3/4 cups all-purpose flour
1 teaspoon baking soda
1 teaspoon salt
1/2 cup butter, melted
1/2 cup plain Greek yogurt
3/4 cup granulated sugar
3/4 cup packed light-brown sugar
2 large eggs
2 teaspoons vanilla extract
1 cup semisweet chocolate chips
1 cup dark chocolate chips
1/2 cup walnuts, chopped (optional)